Stihl HS 56 C-E Instruction Manual - Page 18

English Engine Management Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. Adjusting the Carburetor General Information The carburetor comes from the factory with a standard setting. This setting provides an optimum fuel-air mixture under most operating conditions. With this carburetor it is only possible to adjust the high speed and low speed screws within fine limits. Standard Setting N Stopping the Engine N Inspect cutting blades and clean if necessary (clean, move freely, not warped). N Check the air filter and clean or replace if necessary. N Check the spark arresting screen (not in all models, country-specific) in the muffler and clean or replace if necessary. LH LA N Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn). N Turn the low speed screw (L) carefully counterclockwise as far as stop (no more than 3/4 turn). N Start and warm up the engine. Adjusting Idle Speed Engine stops while idling N Carry out the standard setting. N Turn the idle speed screw (LA) clockwise until the cutting blades begin to run - then back it off about 1 full turn. Cutting blades run when engine is idling N Carry out the standard setting. N Turn the idle speed screw (LA) counterclockwise until the cutting blades stop moving - then turn it another 1 full turn in the same direction. 0008BA016 KN If the cutting blades continue moving when the engine is idling, have your hedge trimmer checked and repaired by your servicing dealer. 16 HS 46, HS 46 C, HS 56 C